..this is interesting. Seems that Sylvania recognizes the short life of the bulbs

This is off of the back of the package (verbatim):

SYLVANIA Silver Start bulbs are engineered to provide better down road performance and clarity. which results in product life that is less than Basic bulbs. An average driver will use their low beam headlights 100 hours per year. SYLVANIA guarantees your complete satisfaction for up to 12 months from date of purchase. If your are not completely satisfied... yada yada yada... return them or call them....

So... seems to be the reason they burn out so quick. Short service life as recognized by the manufacturer. Haven't installed them yet but will shortly... and I'll keep my receipt to swap out bulbs (pain in da azz) if need be... but I doubt that find my receipt later.

Oh well... be cool to see the difference. I'll post a pic of one bulb swapped out in comparison to the OEM bulb later in this thread.